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Physical processing effects on polycrystalline YBa2Cu3Ox

Published online by Cambridge University Press:  31 January 2011

W. K. Ford ,
J. Anderson ,
G. V. Rubenacker ,
John E. Drumheller ,
C. T. Chen ,
M. Hong ,
J. Kwo  and
S. H. Liou
W. K. Ford
Affiliation:
Department of Physics and the Advanced Materials Center, Montana State University, Bozeman, Montana 59717
J. Anderson
Affiliation:
Department of Physics and the Advanced Materials Center, Montana State University, Bozeman, Montana 59717
G. V. Rubenacker
Affiliation:
Department of Physics and the Advanced Materials Center, Montana State University, Bozeman, Montana 59717
John E. Drumheller
Affiliation:
Department of Physics and the Advanced Materials Center, Montana State University, Bozeman, Montana 59717
C. T. Chen
Affiliation:
AT & T Bell Laboratories, Murray Hill, New Jersey 07974
M. Hong
Affiliation:
AT & T Bell Laboratories, Murray Hill, New Jersey 07974
J. Kwo
Affiliation:
AT & T Bell Laboratories, Murray Hill, New Jersey 07974
S. H. Liou
Affiliation:
AT & T Bell Laboratories, Murray Hill, New Jersey 07974
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Abstract

The effect of heating YBa2Cu3Ox in vacuum to 600 °C has been studied using photoelectron spectroscopy and diamagnetic susceptibility measurements. Evidence of two chemically distinct copper and barium species is found in single phase samples at room temperature cleaned by gentle heating at 450 °C. Such annealing also increases the volume diamagnetic susceptibility of the samples which suggests that the preferred stoichiometry of growth does not lead to an optimum superconducting phase. Samples cleaned by vacuum scraping or ion bombardment reveal more amorphous XPS structure and are less indicative of bulk properties.

Type
Articles
Information
Journal of Materials Research , Volume 4 , Issue 1 , February 1989 , pp. 16 - 22
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

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